The Aedificare (Latin for build) family, also known as the Engineers, is comprised of the hardhat-wearing, wrench-swinging, sometimes cowboy-like species (plural) of the TF2 ecosystem. They hail from Texas and are known for their ability to construct buildings.

The first Engineer appeared around 3 million years ago, in what is now known as Texas. In some arid climates, they seemed to have mask-like faces, which eventually evolved into the Ignus family.

Known Ancient Engineer Species